EP 2662826 A2 20131113 - METHOD FOR DEBLURRING AN INPUT BAR-CODE IMAGE, AND A RECORDING MEDIUM ABLE TO BE READ BY TERMINAL DEVICES AND COMPUTERS
Title (en)
METHOD FOR DEBLURRING AN INPUT BAR-CODE IMAGE, AND A RECORDING MEDIUM ABLE TO BE READ BY TERMINAL DEVICES AND COMPUTERS
Title (de)
VERFAHREN ZUM SCHARFSTELLEN EINES EINGEGEBENEN STRICHCODEBILDES UND AUFZEICHNUNGSMEDIUM ZUR AUSLESUNG ÜBER ENDGERÄTE UND COMPUTER
Title (fr)
PROCÉDÉ POUR DÉFLOUTER UNE IMAGE DE CODE À BARRES D'ENTRÉE, ET SUPPORT D'ENREGISTREMENT POUVANT ÊTRE LU PAR DES DISPOSITIFS TERMINAUX ET DES ORDINATEURS
Publication
Application
Priority
- KR 20110000653 A 20110104
- KR 2011010347 W 20111229
Abstract (en)
Provided is a method for deblurring a bar-code image input via a mobile terminal device, the method comprising the steps of: (a) varying the focal length between a mobile terminal device and any desired article to be bought, and calculating a first to an n th optical transfer function (OTF) specific to the mobile terminal device; (b) inputting a bar-code image and then fixing a specific value, in a signal-to-noise ratio within a permissible range, as the value to be applied to a Wiener filter error metric, and next applying n point spread functions (PSF), that have been calculated from the first to n th optical transfer functions, to the Wiener filter error metric by means of the binary search method, and determining whether the result of applying the Wiener filter error metric is below a predetermined threshold; and (c) subjecting the barcode image to Wiener filtering by selecting a Wiener filter value comprising the signal-to-noise ratio and the point spread function when the result of applying the Wiener filter error metric is below the threshold.
IPC 8 full level
G06T 5/00 (2006.01); G06K 7/10 (2006.01); G06V 10/30 (2022.01); H04N 5/217 (2011.01)
CPC (source: EP KR US)
G06K 7/10851 (2013.01 - EP US); G06T 5/00 (2013.01 - KR); G06T 5/73 (2024.01 - EP US); G06V 10/30 (2022.01 - EP US); H04N 23/81 (2023.01 - KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 2012170862 A1 20120705; US 8320695 B2 20121127; CN 103608838 A 20140226; CN 103608838 B 20160302; EP 2662826 A2 20131113; EP 2662826 A4 20150722; JP 2014508342 A 20140403; JP 5703520 B2 20150422; KR 101055853 B1 20110809; WO 2012093812 A2 20120712; WO 2012093812 A3 20121004
DOCDB simple family (application)
US 201113298414 A 20111117; CN 201180068866 A 20111229; EP 11854600 A 20111229; JP 2013548344 A 20111229; KR 20110000653 A 20110104; KR 2011010347 W 20111229